Full list of all 49 Risen 2: Dark Waters achievements. It takes around 35-40 hours to unlock all of the achievements in the base game on Windows.
The base game contains 43 achievements, and there are 2 DLC packs containing 6 achievements.
Learned each skill once
'Four Muskets against Crow' completed
'Kill Mara' completed
'Defeat the Kraken' completed
Collected 20 legendary items
Acquired 300,000 gold
'The Split Soul' completed
'The Journey to the Underworld' completed
Picked 100 locks
Dug up 50 treasures
Travelled by ship 20 times
Completed 250 quests
Killed 2000 monsters
Killed 500 monsters
Killed 50 sea monsters
Used monkey 20 times
Won drinking duel mini-game 10 times
Acquired 100,000 gold
'Steelbeard's Artefact' completed
'The Greedy Captain' completed
'Garcia's Masquerade Uncovered' completed
'Chaka Datu's Legacy' completed
'The Cunning Captain' completed
At least 5 crew members on the ship
'Build a Raft' completed
'The Gnome Eater' completed
'Ship's Equipment' completed
Killed 20 ambient animals
Collected 10 legendary items
'Following Garcia's Trail' completed
'A New Ship' completed
'The Titan Weapon' completed
'The Ancestors' Blessing' completed
'Free Hawkins' completed
'Become a Pirate' completed
Killed 10 giant crabs
Drank first rum
Found first treasure in the game
'Find Steelbeard' completed
Acquired 1000 gold
Won duel against Severin
Killed 10 monsters
'Rescue Patty!' completed
Killed all gargoyles and gave their eggs to Eldric
'The Marooned Sailor' completed
'The Air Temple' completed
Opened every deadly chest once
Killed all alligators on Treasure Isle
Set course for Treasure Isle for the first time